PB调用C#编写的DLL

C#以其简单易用,功能强大深受大家喜爱.PowerBuilder作为C/S的MIS开发工具,十分简单灵活,开发时间短,开发及维护成本低,一直是中小企业信息管理系统的首选开发工具.但是PB的局限性限制了它进一步的发展,这个就不多说了,玩PB的朋友都清楚.PB如何调用C#写的DLL,这个兴趣一上来,就忍不住要解决它.经过多方查找资料加上自己写代码测试,算是解决这个难题.下面列出开发步骤及各种设置选项(开发工具VS2008SP1+PB9.0-8836)

首先我们打开VS2008,新建一个项目,如图

接着我们双击解决方案下面的属性文件夹[Properties],系统将打开类型的属性设置窗口,选择[应用程序]

点击程序集信息按钮,弹出信息窗口,选中[使程序集COM可见],如图

接下来选择[生成]标签 ,选中[为COM互操作注册]

选择[签名]标签,选中[为程序集签名]-->[选择强名称密钥文件]-->[新建],输入你的密钥名称,去掉[使用密码保护密钥文件],如图

OK,到这里配置完成,下面给出代码

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Web; using System.Security.Cryptography; using System.IO; using System.Web.SessionState; using System.Runtime.InteropServices;

namespace encry { [Guid("FF6B4D57-F34E-49ec-9A3B-D0A17B59F78A")] public interface IEncryption { [DispId(1)] string EncryptString(string encryptString, string encryptKey); [DispId(2)] string DecryptString(string decryptString, string decryptKey); [DispId(3)] string md5(string str, int code); }

[Guid("531D2D13-11DE-41a8-A788-CB51B5642CCE"), ClassInterface(ClassInterfaceType.None), ComSourceInterfaces(typeof(IEncryption))] public class encryption : IEncryption { #region "3des加密字符串" /// <summary> /// DES加密字符串 /// </summary> /// <param name="encryptString">待加密的字符串</param> /// <param name="encryptKey">加密密钥,要求为8位</param> /// <returns>加密成功返回加密后的字符串，失败返回源串</returns> public string EncryptString(string encryptString, string encryptKey) { try { byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8)); byte[] rgbIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString); DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider(); MemoryStream mStream = new MemoryStream(); CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write); cStream.Write(inputByteArray, 0, inputByteArray.Length); cStream.FlushFinalBlock(); return Convert.ToBase64String(mStream.ToArray()); } catch { return encryptString; } } #endregion

#region "3des解密字符串" /// <summary> /// DES解密字符串 /// </summary> /// <param name="decryptString">待解密的字符串</param> /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param> /// <returns>解密成功返回解密后的字符串，失败返源串</returns> public string DecryptString(string decryptString, string decryptKey) { try { byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8)); byte[] rgbIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; byte[] inputByteArray = Convert.FromBase64String(decryptString); DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider(); MemoryStream mStream = new MemoryStream(); CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write); cStream.Write(inputByteArray, 0, inputByteArray.Length); cStream.FlushFinalBlock(); return Encoding.UTF8.GetString(mStream.ToArray()); } catch { return decryptString; } }

#endregion

#region "MD5加密" /// <summary> /// MD5加密 /// </summary> /// <param name="str">加密字符</param> /// <param name="code">加密位数16/32</param> /// <returns></returns> public string md5(string str, int code) { string strEncrypt = string.Empty; if (code == 16) { strEncrypt = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5").Substring(8, 16); }

if (code == 32) { strEncrypt = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5"); }

return strEncrypt; } #endregion } }

生成一下,在你的程序目录下面bin文件夹下有一个debug文件夹,生成的DLL就在里面.这个时候pb还不能调用这个DLL.

在这里说明一下,代码里面的GUID是怎样生成的.

打开你的VS2008命令提示,如图